Rolling-mill.



Patented Mar. 6, I900.

J. KENNEDY.

ROLLING MILL.

(Application filed June 29, 1898.)

4 Sheots-Sheet. I.

(No Model.)

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No. 644,928. Patented Mar. 6,1900.- J. KENNEDY.

ROLLING MILL.

(Application filed June 29, 1898.)

(No Model.) 4 Sheets-Sheet 2.

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No. 644,928. Patented Mar. I900.

J. KENNEDY.

ROLLING MILL.

I (Application filed June 29 18 98.)

(No Model.)

' 4 Sheets-Sheet r.

WITNESSES INVENTOR llnitnn STATES heron. I

JULIAN KENNEDY, OF PITTSBURG, PENNSYLVANIA.

ROLLING-MILL.

SPECIFICATION forming part of Letters Patent No. 644,928, dated March 6, 1900.

$erial No. 6 84,711. (No model.)

To all whom, it may concern:

Be it known that I, JULIAN KENNEDY, of Pittsburg, in the county of Al]egheny and State of Pennsylvania, have invented a new and useful Improvement in Rolls, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 shows in end View a rolling-mill constructed in accordance with my invention.v Fig. 2 shows the mill in elevation, the housings and gearing being in vertical section. Figs. 3 and 4 show modified constructions of my invention.

The object of my invention is to provide improved adjusting mechanism by means of which the rolls can be adjusted by the vertical motion of a motor operating upon..the adjusting-screws and also to provide simple and strong gearing to drive the rolls.

In the drawings, 2 2 are the rolls of a rolL ing-mill, journaled in housings 3.

4 is the driving-shaft, journaled in stationary bearings in the housings and having a pinion 5 meshing with a gear-wheel 6 on the axis of the roll 2. ,To drive the upper roll 2, I employ a gear-wheel 7, fixed to its" axis and having internal teeth which mesh with a pinion 8 on the driving-shaft. The axis of the driving-shaft is about on a level with the mid-' position of the upper roll with reference to its vertical adjustment, so that said roll can be adjusted vertically throughout the necessary limits of its adjustment without disengaging the teeth of the wheel 7 from the pinion S. This enables me to dispense with spindles and to drive the shaft 4 directly from the engine. Figs. 5 and a illustrate amodification of my invention in thisregard. In this modification the pinion 6 of the lower roll is driven by engagement with the pinion 5 on the driving-shaft 4; and the pinion '7 of the top roll is in gear with the pinion 8 on the driving-shaft, the piniOnS being an ordinary spur-wheel and not an internal gear, as in Fig. 1. The mill shown in Figs. 3 and 4 is a three-high mill having three rolls 2, 2, and 2, but, like the construction of Figs. 1 and 2, the axis of the gear 8 is substantially on a level with the mid-position of the roll 2 with reference to its vertical adjustment, so that the said roll can be adjusted vertically witlr out disengaging the gearing.

Referring again to Figs. 1 and 2, I will describe my improved mechanism for adjusting the upper roll. The bearings of this roll are upheld by supports 9 extending from ordinary counterbalancing-cylinders 10 or other suitable counterbalancing mechanism, and the rolls are also provided with adjusting-screws 11,whieh pass through nuts 12 in the housings and have at their upper ends threaded portions 13, preferably of more rapid pitch than the threaded portions which fit in the nuts 12, the threads of the parts 13 extending also in a contrary direction, the one being a righthand screw and the other a left-hand screw.

14 14 are nuts which fit on the threaded por tions 13 of the adjusting-screws and are carried by a cross-head 15, moved vertically by a motor,'preferably a hydraulic cylinder 16, whose plunger 17 is connected with the crosshead. To secure uniformity of action of the adj Listing-screws, they are connected by gearwheels 18.. If now the cross-head be moved vertically by the motor-cylinder, the vertical travel of the nuts 14 over the parts 13 oi the screws will rotate the screwshafts, and this rotation will cause the threaded portions 11 to actupon the nuts 12 and to force the screws up or down with a relatively-slow motion, owing to the slow pitch of the threads 11, and to thus effect the desired vertical adjustment of the bearings. 1am therefore enabled to adjust the rolls by a vertical motion of the cross head, which is a simpler and more convenient device than the adjusting mechanism heretofore employed, in which the screws have been rotated directly.

I claim- 1. Adjusting mechanism, comprising adj Listing-screws having threaded portions, the thread of one portion being in opposite direction and of relatively-quicker pitch than the other, traveling nuts set upon the por tions of quicker pitch, and means for moving the nuts along the screws to impart rotation to the screws; substantially as described.

2. Adjusting mechanism for rolls, comprising adjusting-screws having threaded por tions, the thread of one portion being in opposite direction to that of the other, traveling nuts set upon one portion, and means for moving the nuts along the screws to impart rotation to the screws; substantially as described.

3. Adjusting mechanism for rolls, comprising adjusting-screws having threaded portions, the thread of one portion being in opposite direction and of relatively-quicker pitch than the other, traveling nuts set upon the portions of quicker pitch, means for moving the nuts along the screws to impart rotation to the screws, and a cylinder mounted on the housings and adapted to move said nuts; substantially as described.

4. Adjusting mechanism for rolls, comprising vertical rotatable screws, non-rotatable nuts adapted to travel on the screws and to cause them to rotate, a motor mounted upon the housings and adapted to move the nuts, and connecting mechanism arranged to transmit to the roll-bearings the motion produced by rotation of the screws; substantially as described.

5. In a rolling-mill, a set of rolls, one of which is adjustable vertically, a single shaft extending across both housings opposite to the intermediate position of the adjustable roll, toothed wheels secured near the opposite ends of said single shaft, and gears at the opposite ends of the rolls engaging directly with the toothed wheels on said shaft; substantially as described.

6. A two-high rolling-mill having a vertically-adjustable roll, a single shaft extending across both housings opposite to the intermediate position of the adjustable roll, an external gear and pinion connecting one end of the shaft with one roll, and an internal gear and pinion connecting the other end of the shaft with the other roll; substantially as described.

In testimony whereof I have hereunto set my hand.

JULIAN KENNEDY. Witnesses:

L. A. CONNER, Jr., W ALTER KENNEDY. 

